A castrated bull; -- called also bull stag, and bull seg. See the Note under Ox.
Male animal castrated after secondary sex characteristics develop.
cattle or swine castrated after reaching sexual maturity.
Male horse castrated after developing secondary sex characteristics.
(animal science) A male bovine castrated after puberty.
A male animal castrated at or near maturity after having developed definite masculine characteristics.
A boar that has been castrated as an adult.